Software engineer. Author of mswjs.io and @bytebinding.com. Teacher at http://EpicWeb.dev and egghead.io. Storyteller @zakarcher.com. My debut book "LOGGERHEADS" is out 👇 https://zakarcher.com/books/loggerheadshttps://bsky.app/profile/kettanaito.comhttps://bsky.app/profile/kettanaito.com/post/3mvlgvm7izp2qI can't believe there are still developers who don't know that TypeScript isn't versioned per semver. Look it up. Have your minds blown.15 Sep 2026 20:15 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvlgvm7izp2qhttps://bsky.app/profile/kettanaito.com/post/3mvl467a5lc2jMSW add-on for Storybook is downloaded 1,539,807 times per week! That makes it one of the most used add-ons in the entire Storybook ecosystem. Pretty wild. And with the latest release, it's the best way to mock the network in your stories, too. https://github.com/mswjs/msw-storybook-addon15 Sep 2026 17:03 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvl467a5lc2jhttps://bsky.app/profile/kettanaito.com/post/3mvkkllhvd52eIt's crazy how Vitest has replaced not just JSDOM but also React Testing Library with their Browser Mode. I'm absolutely loving this 😍 Once you write a single test like this, you will never want to go back.15 Sep 2026 11:49 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvkkllhvd52ehttps://bsky.app/profile/kettanaito.com/post/3mvix26oyy72uThere is a special room in hell for those preying on the vulnerable financial state of open source maintainers.14 Sep 2026 20:26 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvix26oyy72uhttps://bsky.app/profile/kettanaito.com/post/3mvfhxvqb3u2uIn the new version of MSW docs, all code snippets will feature type definitions for all APIs thanks to Shiki's fantastic Twoslash. This will also allow us to drop redundant explanations as you can inspect the types yourself now.13 Sep 2026 11:18 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvfhxvqb3u2uhttps://bsky.app/profile/kettanaito.com/post/3mvdrr4qpgw2jWhy would I rate my own book? What kind of elaborate trap is this? No author should be the subject of such open cruelty.12 Sep 2026 19:08 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvdrr4qpgw2jhttps://bsky.app/profile/kettanaito.com/post/3mvdqmcnuhi2cWhat a heartwarming review to see 😊 I hope more people enjoy the stories I write for myself.12 Sep 2026 18:48 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvdqmcnuhi2chttps://bsky.app/profile/kettanaito.com/post/3mvdqd33kgc2nWait, Bluesky now automatically enumerates posts? Let me test that.12 Sep 2026 18:43 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvdqd33kgc2nhttps://bsky.app/profile/kettanaito.com/post/3mvd2qnzlao2eIf you're working on a 2FA in your product, please convince your manager against SMS. That has to stop. It's inconvenient and offers no security. Embrace passkeys and other physical security measures. Thank me later.12 Sep 2026 12:16 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvd2qnzlao2ehttps://bsky.app/profile/kettanaito.com/post/3mvd2mxc7ms2jOwn the media you like. Finally got an HDD for all my backups. Not on a cloud, on a physical disk in my drawer. Cheaper and by an order of magnitude more secure. Next, need to hunt down Blurays of my favorite shows that I still don't have. Exciting!12 Sep 2026 12:14 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvd2mxc7ms2jhttps://bsky.app/profile/kettanaito.com/post/3mvctum5lpj2kApparently unpopular opinion, but I cannot care less about steampunk or post-apocalyptic settings for the Avatar. They should've continued on the largely unexplored world of the original. Instead, they brushed over one of the best worldbuildings in fiction to give us this.12 Sep 2026 10:13 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvctum5lpj2khttps://bsky.app/profile/kettanaito.com/post/3mvan7hgryk2tI like how iPhone Duo lets me effortlessly judge the objectivity of a reviewer by the sheer fact of them mentioning the crease. Because it is there 🤷 Two, in fact. You don't need the wear to see them, just tilt the phone a bit.11 Sep 2026 13:09 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mvan7hgryk2thttps://bsky.app/profile/kettanaito.com/post/3mv6wac3fzo2tQuickly, JavaScript, I need an API that runs a callback as late as possible. JavaScript: setImmediate10 Sep 2026 20:45 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv6wac3fzo2thttps://bsky.app/profile/kettanaito.com/post/3mv6t7wo2gg2jQuestion: can I schedule a callback to the absolute end of the event loop, no matter how many frames it will have? Example:10 Sep 2026 19:51 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv6t7wo2gg2jhttps://bsky.app/profile/kettanaito.com/post/3mv6q3fbk3f2lOne of the hardest problems in MSW is letting you observe the network BEFORE you decide to handle it or pass through. You likely never gave this much thought, but no other API mocking library works this way. If you defined a mock, you must mock. Not with MSW.10 Sep 2026 18:55 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv6q3fbk3f2lhttps://bsky.app/profile/kettanaito.com/post/3mv6pojjssn2kSay what you want, these look real nice together.10 Sep 2026 18:48 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv6pojjssn2khttps://bsky.app/profile/kettanaito.com/post/3mv62thq65n2uIf you let your agent write component tests for you, you're in BIG trouble. Why? Because agents were trained on prehistoric tests still using JSDOM. Yikes 🤢 Join me on 📆 October 5th in 🇨🇿 Prague for a live workshop to learn component testing in the real browser with Vitest.10 Sep 2026 12:35 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv62thq65n2uhttps://bsky.app/profile/kettanaito.com/post/3mv5slgxupw2jA Vite plugin allows MSW to have a single, unified, and automated integration that's pre-configured for the environment. A single "virtual:msw" is your entrypoint to anything network throughout the app. See this example of both client and server mocking in TanStack Start.10 Sep 2026 10:07 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv5slgxupw2jhttps://bsky.app/profile/kettanaito.com/post/3mv4fiwtxpx2eIf I had unlimited money, I would very much like to make an e-reader that doesn't suck ass. The technology is right there.09 Sep 2026 20:40 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv4fiwtxpx2ehttps://bsky.app/profile/kettanaito.com/post/3mv4c73dw5j2kDoes something like an "ecosystem-test" GitHub action exist? - Checkout the given repo. - Install the working repo as the dependency. - Run the specified commands (e.g. build + test). Maintainers, how do you do this? Don't tell me that by hand.09 Sep 2026 19:41 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv4c73dw5j2khttps://bsky.app/profile/kettanaito.com/post/3mv4bozp2e22gA cover's job is to make you read the blurb. The blurb's job is to make you open the first chapter. The first chapter's job is to make you never want to put down the book you're holding.09 Sep 2026 19:32 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3mv4bozp2e22ghttps://bsky.app/profile/kettanaito.com/post/3muzi75mny32uI never got to properly thank Forbes for compiling an annual list of companies using MSW. I'm not sure why they stopped at 500, but I'm still grateful!08 Sep 2026 16:51 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3muzi75mny32uhttps://bsky.app/profile/kettanaito.com/post/3muzhv2eymj2lMSW is celebrating 8 years this November. Whatever special should I prepare for that date 🤔08 Sep 2026 16:45 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3muzhv2eymj2lhttps://bsky.app/profile/kettanaito.com/post/3muzgwkhqvu2mNo way.08 Sep 2026 16:28 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3muzgwkhqvu2mhttps://bsky.app/profile/kettanaito.com/post/3muynkono2s2yIt is a special kind of pride to see your book out there in the world. [contains quote post or other embedded content]08 Sep 2026 08:54 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3muynkono2s2yhttps://bsky.app/profile/kettanaito.com/post/3muxiru3uft2qSometimes you're successful in your 30s. Something in your 40s. What matters is your continuous delivery.07 Sep 2026 21:56 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3muxiru3uft2qhttps://bsky.app/profile/kettanaito.com/post/3muxhviwflw2jI've been reading Berserk lately and seeing how much Dark Souls was inspired by Miura's work, I'm compelled to replay the games because they are, in my mind, set in the Berserk universe that's already dead.07 Sep 2026 21:40 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3muxhviwflw2jhttps://bsky.app/profile/kettanaito.com/post/3muxdt4mxdw2nYou know what a magician and a DevOps engineer have in common? They never reveal their secrets.07 Sep 2026 20:27 +0000at://did:plc:dom5xpmepmtuk52jspdkb5sd/app.bsky.feed.post/3muxdt4mxdw2n